CWNU 154
0.20
UTI
0.25
CN
0.3
Cdens
0.12
CC3
0.15
Clit
1.0
Cdup
Stellar density (N50/rad)
1.5 [N/pc2]
- CN 0.25 Poorly populated
- Cdens 0.3 Loose
- CC3 0.12 Very low quality
- Clit 0.15 Rarely studied
- Cdup 1.0 Unique
đĨ Members
đ Colab
đŦ Bayestar19
MOCA
đ CDS
đ Simbad
đ CDS (Îą, δ)
đ Simbad (Îą, δ)
MOCA
đ CDS
đ Simbad
đ CDS (Îą, δ)
đ Simbad (Îą, δ)
Overview
CWNU 154 is a poorly populated, loose object of very low C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the absorption and metallicity parameters (see Parameters). It is rarely studied in the literature.
â ī¸ Warning: the low UTI value and no obvious signs of duplication (Cdup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 77.869 | 38.13 | 0.882 | -0.343 | -2.147 | -7.354 |
| Zhang et al. | 2024 | 77.942 | 38.105 | â | â | â | â |
| Hunt & Reffert | 2024 | 77.942 | 38.105 | 0.892 | -0.321 | -2.179 | -10.775 |
| Cavallo et al. | 2024 | 77.848 | 38.156 | 0.892 | â | â | â |
| Hunt & Reffert | 2023 | 77.942 | 38.105 | 0.892 | -0.321 | -2.179 | -10.775 |
| He et al. | 2022 | 77.952 | 38.107 | 0.87 | -0.34 | -2.27 | â |
đĄ Note: The UCC values are estimated from its identified members.
| Reference | Year | Dist [kpc] | Av [mag] | DAv [mag] | Age [Myr] | [Fe/H] [dex] | Mass [Msun] | Bfrac | BSS |
|---|---|---|---|---|---|---|---|---|---|
| UCC | 99999â | 1.22 | 0.84 | 0.67 | 54 | 0.051 | 112 | â | â |
| Liu et al. | 2025 | 1.69 | 0.34 | â | 52 | â | â | â | â |
| Zhang et al. | 2024 | â | â | â | â | -0.261(1) | â | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 112(1) | â | â |
| Cavallo et al. | 2024 | 1.15 | 0.93 | â | 56 | 0.130 | â | â | â |
| Hunt & Reffert | 2023 | 1.03 | 0.75 | 0.67 | 111 | â | â | â | â |
| He et al. | 2022 | 1.29 | 1.33 | â | 40 | 0.051 | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Liu et al. (2025)
Classified as primordial binary cluster 59 along with CWNU_1145.
Palma et al. (2025)
Part of multiple system G32, along with FSR_0744 and CWNU_1145.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).